Roland XV Rhythm contains 88 keys so you
can use whatever format is convenient for you. As you may notice In/Out Notes in
the map are off by one octave. For example: note A0 in Roland XV is equal
to A-1 on Cubase. This is not a mistake. Roland and Cubase just named them in
different way.

There is an option to change
multiple note Midi Channel or output at once:

Since Cubase midi setup (Setup MME) introduces
map to midi interfaces, selecting output in XVEditPro's built-in
Cubase Drum Map editor is done by selecting number 0 to 12 where output
"0" corresponds to a first/ most top interface in Cubase.

In Performance mode, if you use Rhythms in more
than one part you can use option "Use Parts On Midi Channels" to
change drum sound names to key names from Rhythms assigned to those parts. If
you want to use this option, make sure that those Rhythms are also
"received".